Final answer:
A lytic lesion on an x-ray refers to an area where bone has been destroyed or resorbed. It appears as a dark spot or hole on the x-ray image. Lytic lesions can be caused by various conditions, such as bone infections, tumors, or metastases from cancer.
Step-by-step explanation:
A lytic lesion on an x-ray refers to an area where bone has been destroyed or resorbed. It appears as a dark spot or hole on the x-ray image. Lytic lesions can be caused by various conditions, such as bone infections, tumors, or metastases from cancer. These lesions have distinct characteristics, including irregular borders, an absence of reactive bone formation, and the potential for expansion.